Carl created FLINK-24836:
----------------------------

             Summary: Over window in month time calculated an incorrect 
aggregation result.
                 Key: FLINK-24836
                 URL: https://issues.apache.org/jira/browse/FLINK-24836
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.13.1
            Reporter: Carl
         Attachments: image-2021-11-09-12-30-25-311.png, 
image-2021-11-09-12-30-36-181.png, image-2021-11-09-12-30-54-375.png

when i use tumble window in month, it throw an exception:

_Window aggregate only SECOND, MINUTE, HOUR, DAY as the time unit. MONTH and 
YEAR time unit are not supported yet._

!image-2021-11-09-12-30-25-311.png!

When i use over window in month, it  don't throw any exception but calculated 
an incorrect aggregation result.

!image-2021-11-09-12-30-36-181.png!

 

 

!image-2021-11-09-12-30-54-375.png!

 

 



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